Rotary air-compressor.



F. PECK.

ROTARY AIR COMPRESSOR. APPLICATION FILED APR. 29, 1909.

Patented Feb. 15, 1910.

4 SHEETS-SHEET 1.

3 Hum 1'0 1 Frank Peck 191 names awe mung P. PEOK.

ROTARY AIR COMPRESSOR.

APPLICATION FILED APR. 29, 1909.

949,714. Patented Fb.15,1910.

8141mm l'oz Prim/6.2 6%

Witnesses zmwfw z P. PEOK. ROTARY AIR COMPRESSOR.

APPLICATION FILED APR.29,19 09.

Patented Feb. 15, 1910.

4 SHEETS-SHBET 31 BI HIIIHHI we Hwooeo P. PEUK.

ROTARY AIR COMPRESSOR.

APPLICATION FILED APR.29, 1909.

Patented Feb. 15, 1910.

4 SHEETSSHEET 4.

5140014 for,

- F/"arzicfeclt Witwaooao attuned;

tlhliliilfilt) STATES OFFICE,

FRANK PECK, OF ROCHESTER, NEW YORK, ASSIGNOR TO THE PECK AIR COMPRESSOR COMPANY, OF ROCHESTER, NEW YORK, A CORPORATION OF NEOV YORK.

ROTARY AIR-COMERESSOR.

Specification .of Letters Patent.

'Efatented Feb. 15, 1910.

Application filed April 28, 1909. Serial No. 492.969.

To all whom it may concern:

Be it known that I. FRANK Print, a subject of the King of Great Britain, residing at Rochester, in the county of Monroe and State of New York, have invented new and useful Improvements in Rotary Air-Gompressors, of which the following is a spec ticatiou.

This invention relates to rotary air compressors, the object of the invention being to provide an air compressor of the character described which will run without appreciable jar or vibration reducing the friction to a minimum and thereby avoiding excessive heating of the parts, also economizing in the power necessary to drive the air compressor in proportion to the air compressing capacity of the machine.

A further object of the invention is to combine the parts of the air compressor in such manner as to render the device, as a Whole, exceedingly compact. strong and durable.

Vith the above and other objects in view. the nature of which will more fully appear as the description proceeds. the invention consists in the novel construction, combination and arrangement of parts as herein fully described, illustrated and claimed.

In'the accompanying drawings:-ifigure 1 is a view in elevation of a ,rotary air conr pressor embodying the present invention. Fig. 2 is a vertical sectional view of the same taken in line with the center of the hollow shaft. Fig. 3 is a view in elevation of an air compressor embodying certain modifications as compared with the machine shown in Figs. 1 and Fig. l is a vertical section through the same taken in line with the center of the hollow shaft.

In the preferred embodiment of the invention, illustrated in Figs. 1 and 2, the air compressor embodies a cylindrical rim 1 provided along its opposite edges with in ward'ly extending flanges 9, the said rim being carried by a pair of hub sections 3 and 4 provided with radial arms 5 and (3 flanged at their outer ends as shown at 7 and bolted to the flanges 2 of the rim 1 as shown at 8.

Between the flanges Q and 7 referred to are clamped a pair of. parallel annular hear ing plates 9 which form portions of a cylindrical casing or jacket. The inner portion of this jacket is shown at 10 the same being provided with parallel side flanges 11 which overlap at their outer edges, the inner edges of the plates9, thereby forming an inclosed air space in whlch air is lntroduced for the purpose of cooling the air compressing cylinders hereinafter more particularly described.

The hub sections 3 and dby which the a hollow shaft to be hereinafter more fully described.

Mounted in the jacket comprised between the outer and inner walls 1 and 10 and the side alls 9 and 11 is a circular series of air compressing cylinders 17. Each of these cylinders is mounted for independent oscillation by providing the same with oppositely extending trunnions 18 and 18, the same being journaled in bearing openings in the plates 9 above referred to and as clearly. shown in Fig. 2. in order to provide for lubricating the piston and cylinder, one of the trunnions 18 is provided with substantially parallel air and oil passages 19 and 20 respectively, leading from the inside of the. cylinder to an oil cup or reservoir 21 mounted on the end of the trunnion 1S and provided with a filling cap or plug 22. Each cylinder is further provided at its opposite ends with outer andinner air intake valves 23 and 24; respectively, the same being in the form of inwardly; opening check valves. (Vithin each cylinder 17 works a hollow cylindrical piston 25 provided in its oppo site sides with air inlet valves 20 andQY, the same being in the form of inwardly opening check valves. The piston is mounted on the outer end of a hollow piston rod 98, the inner end of which is pivotally connected at 29-to the central section 30 of a hollow shaft. embodying relatively smaller end seetious 31 and 32, which sections are our-naled in the bearing openings 16 in the cores 17 above referred to. The pistonrods 28 pass through slots 28 in the wall 10 of the jacket and also through sliding follower plates 28 working against the wall 10 and closing the slots 28. I

The central larger :tion 30 of the hollow shaftis divided into air-receiving and discharge compartments 33 and 31 by means of a central dividing partition 35 and is provided in its opposite sides with ports 36 which communicate directly with the smaller end portions 31 and'32 of the shaft, the last-named sections being provided with flanges 37 by means of which they may be bolted to the central section of theshaft, as

. low piston rod .28 as shown in Fig. 2. Each cylinder is further provided with a stuffing .box 40'thr0ugh which the rod 28 recipro cates, forming a tight joint between said rod and the cylinder.

Leading from the receiving chamber 33 into the annular air jacket above described is a pipe 41 whereby the air received in the section 31 of the shaft is conveyed through the compartment "33 and pipe 41 into the said air jacket where it circulates entirely ,around the jacket and'among the cylinders serving to keep the same in a cool condition.

The cores 15 are prevented from rotating by means of braces or stays1'42 fastened at one end to the pedestals l3 and 14 and connected at their'opposite ends to said cores as shown at '43.

44 designates a counter-shaft which is mounted in a bearing 45 at the topo'fthe pedestal'13 and in another bearing 46 atthe top of anadditional pedestal 47, said shaft being provided at its outer end with a drive pulley 48 adapted to receive motion by means of a belt from any suitable motor. A gear wheel 49; on the counter-sha'ft44 meshes with a corresponding gear wheel 50 fast on one of thehub sections 3 of the main frame 1 thus imparting'rotary motion thereto. Another gear wheel'5l fast on the shaft 44' meshes with a similar wheel 52 fast on the projecting end of the section 31 of the hollow shaft thereby imparting motion .to

; rotation are eccentric with relation to each other or arranged at a distance apart equal to one-half the stroke of the pistons 25, therefore, in each complete revolution of .the air compressor, a complete back and forthqstroke is imparted to each and-every piston 25. v

In operation, referring to Fig. 2 of the drawings as the piston 25 moves outward, the valve 23 closes and the valve 26 opens and the air held between the piston and outer end of the cylinder is caused topass through the rod 28 into thechamber 34 and out through the shaft section 32. In the reverse movement of the piston, the valve 23 opens, the valve 26 closes, the valve 27 opens, and the valve 24 closes, therefore the air caught betweenthe piston and the inner end it will be observed that the t-runnion's 1930f each cylinder may be made hollow ,as shown in Fig. 4 and the said trunnions may be connected by means of a flanged swiveled joint 53 to a common,connecting circular pipe 54 arranged between the arms 6 and the air' jacket, the. said circular pipe being placed in communication with the d ischarge chamber 34 by means of a flexible plpe the ends of which are slidingly arranged in the ball.

' members 56 and 57 of ball and socket joints 58 and 59 associated.respectively with the pipe 54 and the central enlarged section 30 of the hollow shaft as clearly shown in Fig. 4. T he air intake valves 60 and 61 maybe arranged in one side of the cylinder'v'vhile at the opposite side, the connections 62 and (33 are interposed between the cylinder and the hollow trunnion. .19, said connections containing check valves (54 and 65 which allow the air to pass from the cylinder into the pipe 54 while preventing the return thereof. The arrangement just described and clearly illustrated in Fig. 4 also provides a double action of each pump cylinder,

'each stroke of the piston serving to draw in and expel air in the compressing operation. If desired, a casing 66 may be placed over the upper portion of the compressor as shown in Fig. 4 to partially inclose the same.

The construction illustrated in Figs. 1 and 2 is preferred, however, for the reason that it admits of a more compact relation of the parts without detracting in any way from the efficiency of the compressor, as a whole.

I. claim 2- 1. A rotary aircompressor comprising. a

rotary annnlar'air jacket, a circular series of radially disposed air compressing cylinders journaled in said jacket and'communieating therewith, pistons working "in said cylinders, a hollow two chambered pistoncontrolling hub, Lo which the rods of the pistons are connected, cylinder carrying: hubs for said rotary jacket eccentric to the first-named hub, hollow shaft sections communicating at opposite ends with the chambers of the piston controlling hub, means for .conducting air froin'one chamber of said hub to the rotary jacket, and valve controlled means for conducting air from the compression cylinders to the other chamber of the piston controlling hub.

2. A rotary'air compressor comprising a rotary annular air jacket, a circular series of radially disposed air compressing cylinders journaled in said jacket and communieating, therewith, valved hollow pistons working in said cylinders, a hollow two chambered piston controlling to which the rods of said pistons are connected, cylinder carrying hubs for the rotaryjacket eccentric to thefirst-named hub, hollow shaft therewith, valved hollow pistons working insaid cylinders, hollow piston rods, a hollow two chambered piston controlling hub -to which the rods of said piston are connected.

and with one of the chambers of which said rods are placed in communication, cylinder carrying hubs for the rotary jacket eccentric to the first named-hub, hollow shaft sections communicating at opposite ends, with the chambers of the piston. controlling hub, andmeans for conducting air from one chamber of said hub to the rotary jacket;

l. A rotary air compressor comprising-a rotary annular air acket, a circular series of radially disposed air compressing cylinders j ournaled in said jacket and communicating therewith,'valved hollow pistons working in said cylinders, hollow piston rods,a hollow two chambered piston controlling hub to which said piston rods are connected, flexible connections between said hollow piston rods and one of the air chambers of the hub,

cylinder carrying hubs for said rotary j acket', hollow shaft sections communicating at oppositeends with the. chambers of the piston controlling hub, and means for. conducting air from one chamber of said hub to the rotary jacket.

5. A rotary air compressor comprising a rotary annular alr acket, a circular'series'of radially disposed air compressing cylinders.

journaled'inf said jacket and commun cating therewith, yalved hollow double acting pistons Working in said cylinders, hollow. piston rods, a hollow two chambered pistonthe rotary jacket eccentricto't controlling hub to which the piston rods are connected, cylinder carrying hubs for said rotary jacket eccentricto the first named hub, hollow shaft sections communicating at opposite ends with the chambers of the piston controlling hub,"and means for conductrotary jacket.

6.-A-rotary air compressor comprising a rotary annular air acket, a-circular series of radlally disposed air compressing cylinders hollow two chambered, piston controlling hub, piston rods having a jointed connection ing hubs {orwith said hub, cylinder carr e first named 'ingair from one chamber'of said liuh'to the I journaled on saldshaft and, communicating a with said jacket, pistons in said cylinders, a

hub, hollow shaft sectionslcommunicating at.

opposite ends with the chambers of the pis ton controlling hub, means for conducting tary jacket,- and Valvecontrolled means for conducting'air from the compressing cylin-' ders to theother chamber \of the piston controlling hub. 7. A. rotary air compressor comprising; a

rotary annular air jacket, a circular series'of radially disposed air compressing cylinders and communicating with said jacket and provided with inlet valves at opposite ends thereof, pistons working. in said cylinders and provided --with; valves in the opposite heads thereofjfahollow two chambered piston controlling, hub to which the rods of said pistons are connected, cylinder carrying hubs for said rotary jacket eccentric to the A first named hub,h0l low shaft sections communicating at oppos te 'ends with the chambers; of the piston control-ling hub, 'means for conducting air from one chamber of said hub to the rotary jacket, and hollow piston rods connecting the hollow pistons with one ofhe air chambers of the piston controlling hu I In testimony whereof I afiix my signature inpresence of two witnessesl FRANK PECK.

- Witnesses:

LLoYD L. SYnEs, EDWARD LYNN.

70" air from one chamber of said hub to the ro- I r 

